<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'#000000'" :radius="5"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh+'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-item', index===active?'active':'']" @click="activeChange(index)">
						{{item.cat_name}}
					</view>
				</block>

			</scroll-view>
			<!-- 右侧的滑动区 -->
			<scroll-view scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,index2) in cateLevel2" :key="index2">
					<view class="cate-lv2-title">
						{{item2.cat_name}}
					</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,index3) in item2.children" :key="index3"
							@click="gotoGoodList(item3)">
							<image :src="item3.cat_icon" alt=""></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	// 导入自己封装的 mixin 模块
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		// 将 badgeMix 混入到当前的页面中进行使用
		mixins: [badgeMix],
		data() {
			return {
				wh: 0,
				cateList: [],
				active: 0,
				cateLevel2: [],
				scrollTop: 0
			};
		},

		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			this.getCateList()
		},
		methods: {
			//获取分类列表数据
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('https://api-hmugo-web.itheima.net/api/public/v1/categories')
				if (res.meta.status !== 200) {
					return uni.$showMsg()
				}
				this.cateList = res.message
				this.cateLevel2 = res.message[0].children
				// uni.$showMsg('数据请求成功！')
			},
			activeChange(index) {
				this.active = index
				this.cateLevel2 = this.cateList[index].children
				this.scrollTop = this.scrollTop ? 0 : 1
			},
			//跳转到商品列表页面
			gotoGoodList(item) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;
	}

	.left-scroll-view {
		width: 120px;
	}

	.left-scroll-view-item {
		background-color: #f7f7f7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;

		&.active {
			background-color: #ffffff;
			position: relative;

			&::before {
				content: ' ';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #c00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);

			}
		}
	}

	.cate-lv2-title {
		font-style: 12px;
		font-weight: 700;
		text-align: center;
		padding: 15px 0;
	}

	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;

		.cate-lv3-item {
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			width: 33.33%;
			margin-bottom: 10px;

			image {
				width: 60px;
				height: 60px;
			}

			text {
				font-size: 12px;
			}
		}
	}
</style>